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Generator of frequency markers
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Switch for illumination lamps
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Illumination lights thyristor switching device
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Device for control of incandescent lamp brightness
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Device for switching alternating current feed load line
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Switching device for illumination lamps
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Two-phase digital generator
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Digital averaging meter of time intervals
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Device for decoding serial-parallel modulated signals
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Digital phase shift device
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Device for synchronizing pulse sequence
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Pulse train synchronizing arrangement
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